Heat miser holds a plastic shovel in his hand, heating it to the point just befo

Question

Heat miser holds a plastic shovel in his hand, heating it to the point just before it starts to melt. Assume the shovel has a weight of 0.196 newtons. The temp of heat miser's cave (and thus the original plastic) is 90 degree Fahrenheit. If we add 500 joules of heat energy to the plastic, what is the final temp of the material? Assume the specific heat capacity of the plastic is 1.3 kilojoules per kilogram kelvin.
Heat miser holds a plastic shovel in his hand, heating it to the point just before it starts to melt. Assume the shovel has a weight of 0.196 newtons. The temp of heat miser's cave (and thus the original plastic) is 90 degree Fahrenheit. If we add 500 joules of heat energy to the plastic, what is the final temp of the material? Assume the specific heat capacity of the plastic is 1.3 kilojoules per kilogram kelvin.

Explanation / Answer

w=0.196N
mg=0.196 N
m=0.196/9.8=0.02 kg
now
T=90 deree Fahrenheit=256.7778 K

m*C*dT+Q=0

(0.02)*1300*(T-256.77)+500=0

(0.02)*1300*(T-256.77)+500=0

T=256.77-19.23

=237.539 K

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